From: Felipe Balbi <balbi@kernel.org>
To: Roger Quadros <rogerq@ti.com>, Chunfeng Yun <chunfeng.yun@mediatek.com>
Cc: robh+dt@kernel.org, vigneshr@ti.com, linux-usb@vger.kernel.org,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 3/3] usb: dwc3: keystone: Turn on USB3 PHY before controller
Date: Thu, 14 May 2020 13:21:52 +0300 [thread overview]
Message-ID: <87tv0i4y0v.fsf@kernel.org> (raw)
In-Reply-To: <baaaf89c-4baf-4218-e22e-53cd1a64ec02@ti.com>
[-- Attachment #1: Type: text/plain, Size: 1729 bytes --]
Roger Quadros <rogerq@ti.com> writes:
> On 14/05/2020 04:37, Chunfeng Yun wrote:
>> On Wed, 2020-05-13 at 16:07 +0300, Roger Quadros wrote:
>>> The Local Power Sleep Controller (LPSC) dependency on AM65
>>> requires SERDES0 to be powered on before USB.
>>>
>>> We need to power up SERDES0 power domain and hold it on
>>> throughout the reset, init, power on sequence.
>>>
>>> Signed-off-by: Roger Quadros <rogerq@ti.com>
>>> ---
>>> drivers/usb/dwc3/dwc3-keystone.c | 47 +++++++++++++++++++++++++++++++-
>>> 1 file changed, 46 insertions(+), 1 deletion(-)
>>>
>>> diff --git a/drivers/usb/dwc3/dwc3-keystone.c b/drivers/usb/dwc3/dwc3-keystone.c
>>> index 1e14a6f4884b..46d46f3507fc 100644
>>> --- a/drivers/usb/dwc3/dwc3-keystone.c
>>> +++ b/drivers/usb/dwc3/dwc3-keystone.c
>>> @@ -14,6 +14,7 @@
>>> #include <linux/dma-mapping.h>
>>> #include <linux/io.h>
>>> #include <linux/of_platform.h>
>>> +#include <linux/phy/phy.h>
>>> #include <linux/pm_runtime.h>
>>>
>>> /* USBSS register offsets */
>>> @@ -34,6 +35,7 @@
>>> struct dwc3_keystone {
>>> struct device *dev;
>>> void __iomem *usbss;
>>> + struct phy *usb3_phy;
>>> };
>>>
>>> static inline u32 kdwc3_readl(void __iomem *base, u32 offset)
>>> @@ -95,8 +97,44 @@ static int kdwc3_probe(struct platform_device *pdev)
>>> if (IS_ERR(kdwc->usbss))
>>> return PTR_ERR(kdwc->usbss);
>>>
>>> - pm_runtime_enable(kdwc->dev);
>>> + /* PSC dependency on AM65 needs SERDES0 to be powered before USB0 */
>>> + kdwc->usb3_phy = devm_phy_get(dev, "usb3-phy");
>> Use devm_phy_optional_get() instead?
>
> Indeed, it seems better suited.
patches 1 and 2 are in testing/next
--
balbi
[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 832 bytes --]
next prev parent reply other threads:[~2020-05-14 10:22 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-13 13:07 [PATCH 0/3] usb: dwc3: keystone: Convert binding to YAML Roger Quadros
2020-05-13 13:07 ` [PATCH 1/3] dt-bindings: usb: convert keystone-usb.txt " Roger Quadros
2020-05-27 1:37 ` Rob Herring
2020-06-02 12:36 ` Roger Quadros
2020-05-13 13:07 ` [PATCH 2/3] dt-bindings: usb: ti,keystone-dwc3.yaml: Add USB3.0 PHY property Roger Quadros
2020-05-13 13:07 ` [PATCH 3/3] usb: dwc3: keystone: Turn on USB3 PHY before controller Roger Quadros
2020-05-14 1:37 ` Chunfeng Yun
2020-05-14 7:40 ` Roger Quadros
2020-05-14 10:21 ` Felipe Balbi [this message]
2020-05-25 6:39 ` Roger Quadros
2020-05-25 6:41 ` Roger Quadros
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=87tv0i4y0v.fsf@kernel.org \
--to=balbi@kernel.org \
--cc=chunfeng.yun@mediatek.com \
--cc=devicetree@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-usb@vger.kernel.org \
--cc=robh+dt@kernel.org \
--cc=rogerq@ti.com \
--cc=vigneshr@ti.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).